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Gas turbine nozzle vane insert and methods of installation

United States Patent

September 17, 2002
View the Complete Patent at the US Patent & Trademark Office
A pair of hollow elongated insert bodies are disposed in one or more of the nozzle vane cavities of a nozzle stage of a gas turbine. Each insert body has an outer wall portion with apertures for impingement-cooling of nozzle wall portions in registration with the outer wall portion. The insert bodies are installed into the cavity separately and spreaders flex the bodies toward and to engage standoffs against wall portions of the nozzle whereby the designed impingement gap between the outer wall portions of the insert bodies and the nozzle wall portions is achieved. The spreaders are secured to the inner wall portions of the insert bodies and the bodies are secured to one another and to the nozzle vane by welding or brazing.
Miller; William John (Simpsonville, SC), Predmore; Daniel Ross (Clifton Park, NY), Placko; James Michael (West Chester, OH)
General Electric Company (Schenectady, NY)
09/ 788,328
February 16, 2001
This invention was made with Government support under Contract No. DE-FC21-95MC31176 awarded by the Department of Energy. The Government has certain rights in this invention.